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| author |   Steven Rostedt <srostedt@redhat.com> | 2009-02-24 10:21:36 -0500 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-02-24 21:54:05 -0500 |
| commit | b77e38aa240c3bd9c55c98b9f7c81541e042eae5 (patch) | |
| tree | bbb40993e76edc52d2cae1040b941ba4e4d2f965 /include/asm-generic | |
| parent | tracing: add DEFINE_TRACE_FMT to tracepoint.h (diff) | |
| download | linux-dev-b77e38aa240c3bd9c55c98b9f7c81541e042eae5.tar.xz linux-dev-b77e38aa240c3bd9c55c98b9f7c81541e042eae5.zip | |
tracing: add event trace infrastructure
This patch creates the event tracing infrastructure of ftrace.
It will create the files:
/debug/tracing/available_events
/debug/tracing/set_event
The available_events will list the trace points that have been
registered with the event tracer.
set_events will allow the user to enable or disable an event hook.
example:
# echo sched_wakeup > /debug/tracing/set_event
Will enable the sched_wakeup event (if it is registered).
# echo "!sched_wakeup" >> /debug/tracing/set_event
Will disable the sched_wakeup event (and only that event).
# echo > /debug/tracing/set_event
Will disable all events (notice the '>')
# cat /debug/tracing/available_events > /debug/tracing/set_event
Will enable all registered event hooks.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index c61fab1dd2f8..0add6b28c366 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -61,6 +61,14 @@ #define BRANCH_PROFILE() #endif +#ifdef CONFIG_EVENT_TRACER +#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ + *(_ftrace_events) \ + VMLINUX_SYMBOL(__stop_ftrace_events) = .; +#else +#define FTRACE_EVENTS() +#endif + /* .data section */ #define DATA_DATA \ *(.data) \ @@ -81,7 +89,8 @@ *(__tracepoints) \ VMLINUX_SYMBOL(__stop___tracepoints) = .; \ LIKELY_PROFILE() \ - BRANCH_PROFILE() + BRANCH_PROFILE() \ + FTRACE_EVENTS() #define RO_DATA(align) \ . = ALIGN((align)); \ |